Explanation for Question 5 From the Math (No Calc) Section on the 2018 April Sat
Question five says in the X, Y plane line L passes through the points 2 zero one and one four, which of the following is an equation of line 3 out. So to find the answer to this, 4 we're going to have to use the Y equals MX plus B formula where 5 M represents the slope and B represents the Y intercept. 6 And to find the slope we're going to have to use the slope formula 7 Y two minus Y one over X two minus X one. 8 So let's start by just finding what the Y intercept is. 9 Well, the question tells us that the line passes through the 0.01. 10 And so we know that the Y intercept is positive. 11 One. From that we can eliminate answer choices, 12 B and D, which both have negative one. 13 As there be value. Next, 14 we can use these two points to find the slope. 15 So Y two is four minus Y. 16 One is one over one minus zero, 17 and we get three over one or three. 18 And from that, now that we have the slope and the Y intercept, 19 we can, uh, come up with the whole line. 20 So we know that the slope is three. 21 So Y equals three X plus the Y intercept, 22 which is positive one. And that means that the correct answer is answer choice 23 C.